Workshop manual
English
343R 345RX 343F 345FX 345FXT
2.Electrical system _________________________
Model 343R, 345RX, 343F, 345FX, 345FXT Contents
General recommendations ___________________
1.Starter __________________________________
Fire risk
General recommendations
Remember
Special tools
1 Starter
Contents
Dismantling
1Starter
Dismantling
Assembly
Assembly
Starter
Replacing the drive dogs
Replacing the drive dogs
1Starter
Checking the ignition spark ____________________
Electrical system
Contents
Assembly _________________________________
Checking the ignition spark
Electrical system
Checking the ignition spark
502 71
Electrical system
Electrical system
Replacing the spark
plug cover
502 50
Dismantling
502 54
Electrical system
Dismantling
before the locking catch has been
Drive dogs
Heated handles
Do not pry off the heating element
Electrical system
Wiring diagram
Electrical system
Carburettor settings _________________________
Fuel system
Contents
Assembly _________________________________
Air filter
Fuel system
Air filter
Fuel system
Tank venting
Fuel filter
Massage the oil into the air filter
Fuel system
Fuel pump
Carburettor
Dismantling
Fuel system
The carburettor’s design
The metering unit
The blending unit
The pump unit
The pump unit
Dismantling the carburettor
Fuel system
In the event of leakage – remove the needle valve
Fuel system
little shorter than the L-needle
Note how the jets are
positioned
For example, the H-needleis a
Assembling the carburettor
Assembling the carburettor
Use Loctite on the valve screws
Fuel system
Check carefully that the fuel hoses
are not bent or pinched when the
The H-needleis a little shorter
than the L-needle
Function
Carburettor settings
Basic setting
Fine adjustment
Idling speed T-screw
setting
Correctly adjusted carburettor
The recommended max. speed must not be exceeded
Adjusting the H
Carburettor adjustment 345RX/FX
adjustment 345RX/FX
Adjusting the L-needle
Fuel system
Check for wear on pins A and B
Fuel system
Disassemble the throttle control A, the lock to prevent accidental throttle operation B, the start throttle lock C and the throttle stop D in order to check if replacement is necessary
Page
Dismantling ________________________________
4 Centrifugal clutch
Contents
Assembly _________________________________
Dismantling
Centrifugal clutch
502 21
Dismantling
502 54
Centrifugal clutch
Assembly
Clutch drum
502 11
Assembly
Centrifugal clutch
Change the bearings in the clutch housing if necessary
Page
Dismantling ________________________________
5 Angle gear
Contents
Assembly _________________________________
Dismantling
Angle gear
Let the small circlip around the axle remain
Dismantling
Angle gear
503 97
Assembly
Shaft
Shaft
503 80
Angle gear
Assembly _________________________________
6 Cylinder and piston
Contents
Cleaning, inspection _________________________
Dismantling
Cylinder and piston
Decompression valve
Turn the valve the right way when fitting
Decompression valve
Cylinder and piston
Exercise caution if the inlet
Cleaning, inspection
manifold is fitted using a
Inlet manifold
Action
Analysis and actions
Insufficient lubrication
Cause
Action
Piston scoring caused by heavy carbon deposits
Cylinder and piston
Cause
Damage caused by
Piston damage caused by a too high engine speed
Piston ring breakage
Piston ring guide pin
Action
Foreign objects
Cylinder and piston
Cause
groove. If this is damaged, or if carbon deposits
Service tips
Defect
Be careful with the lower edge of the piston ring
Piston ring groove
Wear tolerances
Cylinder bore
Piston ring gap
Leakage testing the crankcase _________________
7 Crankshaft and crankcase
Contents
Assembly _________________________________
Dismantling
Crankshaft and crankcase
Dismantling
502 52
Crankshaft and crankcase
Inspecting the
Inspecting the
crankshaft
Crankshaft and crankcase
502 50
Assembly
Assembly
Crankshaft and crankcase
far as possible between the bolts
Leakage testing the
crankcase
Press down the sealing plates as
Crankshaft and crankcase
Husqvarna E-Tech
503 55
Page
Electrical system __________________________
Tools
Contents
Starter __________________________________
Electrical
List of tools
505 38
Starter
Workshop
List of tools
gear
Crankshaft
2003W24
114 01